[INFO] fetching crate approximately 1.1.0...
[INFO] testing approximately-1.1.0 against master#c90bcb9571b7aab0d8beaa2ce8a998ffaf079d38 for pr-146098-7
[INFO] extracting crate approximately 1.1.0 into /workspace/builds/worker-1-tc1/source
[INFO] started tweaking crates.io crate approximately 1.1.0
[INFO] removed 0 missing examples
[INFO] finished tweaking crates.io crate approximately 1.1.0
[INFO] tweaked toml for crates.io crate approximately 1.1.0 written to /workspace/builds/worker-1-tc1/source/Cargo.toml
[INFO] validating manifest of crates.io crate approximately 1.1.0 on toolchain c90bcb9571b7aab0d8beaa2ce8a998ffaf079d38
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+c90bcb9571b7aab0d8beaa2ce8a998ffaf079d38" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] crate crates.io crate approximately 1.1.0 already has a lockfile, it will not be regenerated
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+c90bcb9571b7aab0d8beaa2ce8a998ffaf079d38" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-1-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-1-tc1/source:/opt/rustwide/workdir:ro,Z" "-v" "/var/lib/crater-agent-workspace/cargo-home:/opt/rustwide/cargo-home:ro,Z" "-v" "/var/lib/crater-agent-workspace/rustup-home:/opt/rustwide/rustup-home:ro,Z" "-e" "SOURCE_DIR=/opt/rustwide/workdir" "-e" "CARGO_TARGET_DIR=/opt/rustwide/target" "-e" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-w" "/opt/rustwide/workdir" "-m" "1610612736" "--user" "0:0" "--network" "none" "ghcr.io/rust-lang/crates-build-env/linux@sha256:4848fb76d95f26979359cc7e45710b1dbc8f3acb7aeedee7c460d7702230f228" "/opt/rustwide/cargo-home/bin/cargo" "+c90bcb9571b7aab0d8beaa2ce8a998ffaf079d38" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 42639c9f7d159f2831279cb8c1223a10ba138716a64d8864222eb1e8102f33ca
[INFO] running `Command { std: "docker" "start" "-a" "42639c9f7d159f2831279cb8c1223a10ba138716a64d8864222eb1e8102f33ca", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "42639c9f7d159f2831279cb8c1223a10ba138716a64d8864222eb1e8102f33ca", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "42639c9f7d159f2831279cb8c1223a10ba138716a64d8864222eb1e8102f33ca", kill_on_drop: false }`
[INFO] [stdout] 42639c9f7d159f2831279cb8c1223a10ba138716a64d8864222eb1e8102f33ca
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-1-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-1-tc1/source:/opt/rustwide/workdir:ro,Z" "-v" "/var/lib/crater-agent-workspace/cargo-home:/opt/rustwide/cargo-home:ro,Z" "-v" "/var/lib/crater-agent-workspace/rustup-home:/opt/rustwide/rustup-home:ro,Z" "-e" "SOURCE_DIR=/opt/rustwide/workdir" "-e" "CARGO_TARGET_DIR=/opt/rustwide/target" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTFLAGS=--cap-lints=forbid" "-e" "RUSTDOCFLAGS=--cap-lints=forbid" "-e" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-w" "/opt/rustwide/workdir" "-m" "1610612736" "--user" "0:0" "--network" "none" "ghcr.io/rust-lang/crates-build-env/linux@sha256:4848fb76d95f26979359cc7e45710b1dbc8f3acb7aeedee7c460d7702230f228" "/opt/rustwide/cargo-home/bin/cargo" "+c90bcb9571b7aab0d8beaa2ce8a998ffaf079d38" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 68ff587598e8795897d72e1c515c66a043db928f3d8252f0629180a1c386533d
[INFO] running `Command { std: "docker" "start" "-a" "68ff587598e8795897d72e1c515c66a043db928f3d8252f0629180a1c386533d", kill_on_drop: false }`
[INFO] [stderr]    Compiling approximately v1.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] error[E0635]: unknown feature `cfg_match`
[INFO] [stdout]  --> src/lib.rs:8:12
[INFO] [stdout]   |
[INFO] [stdout] 8 | #![feature(cfg_match)]
[INFO] [stdout]   |            ^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] For more information about this error, try `rustc --explain E0635`.
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `approximately` (lib) due to 1 previous error
[INFO] running `Command { std: "docker" "inspect" "68ff587598e8795897d72e1c515c66a043db928f3d8252f0629180a1c386533d", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "68ff587598e8795897d72e1c515c66a043db928f3d8252f0629180a1c386533d", kill_on_drop: false }`
[INFO] [stdout] 68ff587598e8795897d72e1c515c66a043db928f3d8252f0629180a1c386533d